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On cyclopentadienone-ketals and their dimers. A novel rearrangement of α,β-unsaturated ketone dialkyl ketals

✍ Scribed by Sarah Abramson; Jakov Zizuashvili; Benzion Fuchs

Publisher: Elsevier Science
Year: 1980
Tongue: French
Weight: 187 KB
Volume: 21
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)92604-2

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✦ Synopsis

The dimers(La & b) of dimethyl-and diethylcyclopentadienone ketals(la & b) undergo a novel 1,3-alkoxy-rearrangement to 4_(a & b). Mild hydrolysis of 2 or 3 gives the monoketones (?a or b). On strong acid catalysed hydrolysis 2, 5. or 4 afford the cyciopentadienone-dimer(6)

In contrast to the notorious elusiveness of cyclopentadienone, its ketals (I] had been

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